Torn tread blocks are caused by not airing the tire down when driving trails littered with small rock and jagged larger rock. Many tires with large, deep tread blocks suffer from this.
In my early days of off roading, I was reluctant to air down except for sand, which was relatively rare in areas I explored in. Lots of rocks, bedrock, narrow slot canyons surfaced with broken rock, dry waterfalls. I began to notice I tore up my BFG All Terrain T/As prematurely (KO2’s weren’t thought of yet). A friend reasoned with me about the positives of airing down over stony trails. This not only helps floatation in sand, but also allows the tire to mold itself over sharp obstacles instead of presenting a hard face to it. As well as smooth the ride. I’ve been practicing airing down since.
That said, many so-called off road tires don’t have multiple sidewall plies, even LT rated ones. I don’t recommend airing down P rated tires. The sidewalls will be sliced open on rocky trails. It’s easy to slice and dice OEM P rated tires found on most 4x4’s offered, even our T4R’s. I sliced open a front sidewall on my OEM tires within two months of purchase of my ‘18 on a small, sharp protruding stone hidden by sagebrush within feet of the highway I was returning to. Swapped out my OEMS for Load Range E KO2’s the next day.
If the OP puts the majority of his miles on his T4R on the road, a P rated snow tire will be sufficient.
Like I mentioned in a previous post, I have had excellent success with my BFGs and are a good value for my needs. To be honest, what research I’d done is kind of overwhelming with new technology and a flood of inexpensive imports. Since I live in an isolated small town, I go with what I can get at my local family owned shop. I can probably get better tires if I drive six hours round trip, but if they fail, then I have to pay to have them fixed, rotated and balanced at my local store. Or drive back to the city to get it done free. So I buy what works for me and the rest is free.